https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/365/36503.htm
https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/
https://www.politico.eu/article/eu-uk-relations-rishi-sunak-brexit/
http://cdn.budgetresponsibility.org.uk/July_2017_Fiscal_risks.pdf